Explanation:
Majestic on a truly cosmic scale, M100 is appropriately known as a
grand design spiral galaxy.
It is a large galaxy of over 100 billion stars with well-defined spiral arms that is similar to our own
Milky Way Galaxy.
One of the brightest members of the
Virgo Cluster of galaxies,
M100
(alias NGC 4321) is 56 million light-years distant toward the constellation of
Berenice's Hair
(Coma Berenices).
This Hubble
Space Telescope image of
M100 was taken recently with the
Wide Field Camera 3 and accentuates bright blue
star clusters and
intricate winding
dust lanes which are hallmarks of this class of galaxies.
Studies of variable stars in
M100
have played an important role in determining the
size and age of the Universe.